You developed a service for publishing and managing ads on Avito. What exactly did you do to make it faster?

To speed up the ad publication management service on Avito, the following could be done:

• Caching: use caching for frequently requested data (e.g., ad statuses) in memory or Redis to reduce database load.
• Asynchronous processing: separate ad publication from heavy operations (e.g., indexing or notifications) using a message queue.
• Database query optimization: add indexes, use efficient queries, minimize the number of requests.
• Parallelism and goroutines: use goroutines for parallel processing of requests and background tasks.
• Data compression and minimization: reduce the volume of data transmitted between services.
• Monitoring and profiling: identify bottlenecks and optimize them.

Example code using goroutines for parallel publication processing:

func PublishAd(ad Ad) error {
    // Launch asynchronous index update
    go func() {
        err := updateSearchIndex(ad)
        if err != nil {
            log.Println("Index update failed:", err)
        }
    }()
    // Main publication logic
    err := saveAdToDB(ad)
    return err
}